In a large bowl, crack two eggs and whisk them together until frothy. Next, add ⅓ cup of Greek yogurt, 1 to 2 tablespoons of granulated sweetener, and 1 teaspoon of vanilla extract. Mix well until the batter is smooth and well combined.

In a separate bowl, combine ½ cup of oat flour, ⅓ cup of protein powder, ½ teaspoon of baking powder, and a pinch of salt. Stir these dry ingredients until evenly blended, ensuring there are no lumps. Gradually fold the dry mixture into the wet ingredients, mixing gently until you achieve a smooth, lump-free batter.

While your batter rests for a moment, preheat your waffle iron according to the manufacturer's instructions. Lightly grease the plates with cooking spray or a brush of oil to prevent sticking.

Pour an appropriate amount of batter into the waffle iron, spreading it evenly if needed. Close the lid and cook the waffles for about 3 to 5 minutes or until golden brown and crispy, depending on your specific appliance.

Carefully remove the Protein Waffles from the iron using a fork or spatula, allowing them to cool slightly on a wire rack. Serve them warm topped with your favorite ingredients such as fresh fruits, a drizzle of maple syrup, or an extra dollop of Greek yogurt.